低温环境下轮胎滚动阻力特性研究

Study on Rolling Resistance Characteristics of Tire in Low Temperature Environment

摘要: 为应对电动汽车续航里程的法规要求和研发需求，本文使用扭矩法测试轮胎在低温环境下的滚动阻力性能表现。结果表明，轮胎滚动阻力随温度降低而升高，部分雪地型轮胎与普通型轮胎相比滚动阻力随温度变化的程度较低，标准ISO 28580规定的温度修正系数在低温环境下仍有参考意义；在低温环境下轮胎滚动阻力随速度和行驶时间的增加均会降低，电动汽车在分析特定场景下的续航里程及电耗时需要考虑本特性。

Abstract: In order to meet the regulatory requirements and research and development needs of electric vehicle cruising range, this paper uses torque method to test the rolling resistance performance of tires in low temperature environment. The results show that the rolling resistance of tires increases with the decrease of temperature. And compared with ordinary tires, some snow tires have a lower degree of rolling resistance changing with temperature. The temperature correction coefficient specified in ISO 28580 is still of reference significance in low temperature environment. In low temperature environment, the tire rolling resistance will decrease with the increase of speed and driving time, so this characteristic should be considered when analyzing the cruising range and power consumption of electric vehicles in specific conditions.